Heat A/C Blower Works on Every Setting Except High, Suggestions?
06-05-2010, 03:34 PM
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Car: 1987 GTA Vert & 1991 GTA 5 Speed
Engine: 87 GTA-L98 91 GTA LB9
Transmission: GTA-700R4 & GTA T5
Heat A/C Blower Works on Every Setting Except High, Suggestions?
I can switch it all around but will not work on highest setting. Worked when got car 2 years ago but went to use it this year and no chance only works on lowest 3 settings.
Is it an electrical connection or is my entire heat a/c control bad?
Also is there a better spot on the board to put this?
Is it an electrical connection or is my entire heat a/c control bad?
Also is there a better spot on the board to put this?
Last edited by Slowridr; 06-05-2010 at 06:50 PM.
06-05-2010, 05:56 PM
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
The issue should be with the resistor in the heater box - as I understand it that controls the high setting - try checking it - there's two screws hold it in the actual heater box on the firewall, has a plug to it, and when you remove it it looks like a coupe curly wires in there.
06-06-2010, 08:03 AM
#3
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
High speed blower relay. Check the following link for more info:
https://www.thirdgen.org/forums/elec...aro-rs-no.html
JamesC
https://www.thirdgen.org/forums/elec...aro-rs-no.html
JamesC
06-06-2010, 08:20 AM
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Car: 1987 GTA Vert & 1991 GTA 5 Speed
Engine: 87 GTA-L98 91 GTA LB9
Transmission: GTA-700R4 & GTA T5
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
James C that was right on the money! Ill go out today and do that procedure.
06-06-2010, 08:33 AM
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
Ahhh, so I had it backwards then - makes sense - resistor to lower the juice 
06-06-2010, 01:47 PM
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Car: 1987 GTA Vert & 1991 GTA 5 Speed
Engine: 87 GTA-L98 91 GTA LB9
Transmission: GTA-700R4 & GTA T5
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
Ok got that working. Did so by cleaning this. 1st 2 pics. Now I have 2 other issies to work thru.
My HVAC will not switch between A/C, Max, Bi-Level, Vent, Deforst , Heat. Is it vaccum I know usually when yuo switch this you hear the sucking sound as the baffles move.
Last thing 3rd pic XH-7, does this mean this unit has been changed for R-134 refridge? Let me know what you think.
My HVAC will not switch between A/C, Max, Bi-Level, Vent, Deforst , Heat. Is it vaccum I know usually when yuo switch this you hear the sucking sound as the baffles move.
Last thing 3rd pic XH-7, does this mean this unit has been changed for R-134 refridge? Let me know what you think.
Last edited by Slowridr; 06-06-2010 at 04:08 PM.
06-06-2010, 02:18 PM
#7
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
My HVAC will not switch between A/C, Max, Bi-Level, Vent, Deforst , Heat. Is it vaccum I know usually when yuo switch this you hear the sucking sound as the baffles move.
Last thing 3rd pic XH-7, does this mean this unit has been changed for R-134 refridge? Let me know what you think.
Last thing 3rd pic XH-7, does this mean this unit has been changed for R-134 refridge? Let me know what you think.
IIRC, when I converted to 134 (I've since returned to 12), the shop put a large sticker on the blower motor indicting the conversion.
JamesC
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06-06-2010, 02:45 PM
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Car: 1987 GTA Vert & 1991 GTA 5 Speed
Engine: 87 GTA-L98 91 GTA LB9
Transmission: GTA-700R4 & GTA T5
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
My bad James C. I grabbed the service manual and it said to crank the car to test all the functons of the switches.
Dang! Everything works.
A little dumb moment for me. Guess old age is setting in.
06-06-2010, 02:48 PM
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Car: 1987 GTA Vert & 1991 GTA 5 Speed
Engine: 87 GTA-L98 91 GTA LB9
Transmission: GTA-700R4 & GTA T5
Re: Heat A/C Blower Works on Every Setting Except High, Suggestions?
By the way I am taking my A/C lines off tomorrow and getting them redone. The system has no charge anyway so its not like Im losing anything. That way when I get stuff going by the end of the week I will not have any leaks.
Is there any others places I should be leary of and check/change out stuff to head off leaks when I get everything put back together?
Is there any others places I should be leary of and check/change out stuff to head off leaks when I get everything put back together?
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